Stretchable Light Emitting Device with Polymer Electrolyte Matrix
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Solution Overview
Problem
Conventional flexible light emitting devices have limited stretchiness, require high driving voltage, and experience decreases in electrical properties and luminous intensity when elongated, making them unsuitable for flexible electronic devices and tactile sensors.
Innovation Solution
A light emitting device comprising an active layer with a light emitting material, ionic material, and polymer matrix that can be compressed and elongated, maintaining or increasing luminous intensity, and a manufacturing method involving a first electrode, active layer, and second electrode, allowing for low-voltage operation and flexibility.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a transparent electrode material is embedded in an elastic polymer material to provide elasticity, then the electrode gains stretchiness, but the electrical properties and luminous intensity decrease during tensile strain
Solution Approach 1:
The patent changes the material parameters by using a polymer electrolyte matrix instead of conventional elastic polymers, and by incorporating ionic liquids. This parameter change allows the electrode to maintain electrical conductivity during stretching, resolving the contradiction between stretchiness and electrical property stability
Solution Approach 2:
The patent creates a composite material system consisting of polymer electrolyte, ionic liquid, and conductive polymer. This composite structure combines the stretchiness of polymers with the electrical conductivity of ionic liquids and conductive polymers, achieving both deformation capability and electrical stability
2Adaptability or versatility
If a light emitting material is dispersed in an elastic polymer material with stretchiness, then the device gains flexibility, but the driving voltage increases and luminous intensity decreases when elongated
Solution Approach 1:
The patent changes the polymer matrix to a polymer electrolyte with specific ionic conductivity parameters, and uses ionic liquids with optimized molecular structures. These parameter changes reduce the driving voltage required while maintaining flexibility and preventing luminous intensity degradation during elongation
3Adaptability or versatility
If conventional flexible light emitting devices are elongated, then the device becomes more flexible, but the luminous intensity decreases
Solution Approach 1:
The patent changes the material parameters by using a polymer electrolyte matrix with high ionic conductivity and incorporating ionic liquids with appropriate viscosity and conductivity parameters. These changes enable the device to maintain or even increase luminous intensity during elongation, resolving the contradiction between elongation capability and luminous intensity
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device is flexible, stretchable, and can operate at low voltage, suitable for flexible electronic devices and tactile sensors, with increased luminous intensity under external pressure or strain, enabling thin and lightweight designs.
Implementation Method 1
the active layer is capable of being compressed and elongated and formed to be maintained or increased in luminous intensity depending on compression and elongation percentage
Data Source
AI summary
A light emitting device and a manufacturing method therefor are provided, and the light emitting device includes an active layer including a light emitting material, an ionic material, and a polymer matrix, and the active layer is capable of being compressed and elongated and formed to be changed in luminous intensity depending on at least one of a pressure for the active layer and an elongation percentage of the active layer.